<template>
  <div id="app">
    <!-- 面包屑 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 头部警告 -->
      <el-alert
        title="注意: 只允许为第三级分类设置相关参数"
        type="warning"
        :closable="false"
        show-icon
      >
      </el-alert>
      <!-- 选择商品分类区域 -->
      <el-row :gutter="24" class="cat_opt">
        <el-col :span="6">
          <span>选择商品分类：</span>
          <!-- 选择商品分类的级联选择框 -->
          <el-cascader
            v-model="selectCateKey"
            :options="cateList"
            @change="handleChange"
            :props="cateProps"
          ></el-cascader>
        </el-col>
      </el-row>

      <!-- tab页签区域  -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button
            @click="addDialogVisible = true"
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            >添加参数</el-button
          >
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe style="width: 100%">
            <!-- 展开行 -->
            <el-table-column type="expand" width="width">
              <template slot-scope="scope">
                <!-- 循环渲染tag标签 -->
                <el-tag
                  closable
                  v-for="(item, index) in scope.row.attr_vals"
                  :key="index"
                  @close="handleCloes(index, scope.row)"
                >
                  {{ item }}
                </el-tag>
                <!-- 输入文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加的按钮 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >添加新标签</el-button
                >
              </template>
            </el-table-column>
            <el-table-column type="index" width="width"> </el-table-column>
            <el-table-column prop="attr_name" label="参数名称" width="width">
            </el-table-column>
            <el-table-column label="操作" width="width">
              <template slot-scope="scope">
                <el-button
                  @click="showEditDialog(scope.row.attr_id)"
                  type="primary"
                  size="mini"
                  icon="el-icon-edit"
                  >编辑</el-button
                >
                <el-button
                  @click="removeParmas(scope.row.attr_id)"
                  type="danger"
                  size="mini"
                  icon="el-icon-delete"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button
            @click="addDialogVisible = true"
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            >添加参数</el-button
          >
          <!-- 静态属性表格 -->
          <el-table :data="onlyTableDate" border stripe style="width: 100%">
            <!-- 展开行 -->
            <el-table-column type="expand" width="width">
              <template slot-scope="scope">
                <!-- 循环渲染tag标签 -->
                <el-tag
                  closable
                  v-for="(item, index) in scope.row.attr_vals"
                  :key="index"
                  @close="handleCloes(index, scope.row)"
                >
                  {{ item }}
                </el-tag>
                <!-- 输入文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加的按钮 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >添加新标签</el-button
                >
              </template>
            </el-table-column>
            <el-table-column type="index" width="width"> </el-table-column>
            <el-table-column prop="attr_name" label="属性名称" width="width">
            </el-table-column>
            <el-table-column label="操作" width="width">
              <template slot-scope="scope">
                <el-button
                  @click="showEditDialog(scope.row.attr_id)"
                  type="primary"
                  size="mini"
                  icon="el-icon-edit"
                  >编辑</el-button
                >
                <el-button
                  @click="removeParmas(scope.row.attr_id)"
                  type="danger"
                  size="mini"
                  icon="el-icon-delete"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>

    <!-- 添加参数的对话框 -->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 添加参数的对话框  -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>

      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParmas">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改参数的对话框  -->
    <el-dialog
      :title="'修改' + titleText"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <!-- 添加参数的对话框  -->
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>

      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParmas">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'params',
  data() {
    return {
      cateList: [],
      //   级联选择框的配置对象
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
      },
      //   级联选择框双向绑定到的数组
      selectCateKey: [],
      // tab页面绑定的数据
      activeName: 'many',
      // 动态参数的数据
      manyTableData: [],
      // 静态参数的数据
      onlyTableDate: [],
      // 控制对话框的显示与隐藏
      addDialogVisible: false,
      // 添加参数的表单数据对象
      addForm: {
        attr_name: '',
      },
      // 添加表单的验证规则对象
      addFormRules: {
        attr_name: [
          {
            required: true,
            message: '请输入参数名称',
            trigger: 'blur',
          },
        ],
      },
      // 控制修改对话框的显示与隐藏
      editDialogVisible: false,
      // 修改的表单数据对象
      editForm: {
        attr_name: '',
      },
      // 修改表单的验证规则
      editFormRules: {
        attr_name: [
          {
            required: true,
            message: '请输入参数名称',
            trigger: 'blur',
          },
        ],
      },
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories');
      if (res.meta.status != 200) {
        this.$message.error('获取商品分类失败');
      }
      this.cateList = res.data;
    },
    // 级联选择框选中项变化 触发的函数
    handleChange(value) {
      this.getParamsData();
    },
    // tab页签点击事件的处理函数
    handleTabClick() {
      console.log(this.activeName);
      this.getParamsData();
    },
    // 获取参数的列表数据
    async getParamsData() {
      // 不等于三 证明选中的不是三级分类
      if (this.selectCateKey.length !== 3) {
        this.selectCateKey = [];
        this.manyTableData = [];
        this.onlyTableDate = [];
        return;
      }
      // 证明选中的是三级分类
      console.log(this.selectCateKey);
      // 根据分类所选的分类id和当前所处的面板，获取对应的参数
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        {
          params: {
            sel: this.activeName,
          },
        }
      );

      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败');
      }
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : [];
        // 控制文本框的显示与隐藏
        item.inputVisible = false;
        // 文本框中输入的值
        item.inputValue = '';
      });
      console.log(res.data);
      // 判断是哪个表格的数据 静态？动态？
      if (this.activeName === 'many') {
        this.manyTableData = res.data;
      } else {
        this.onlyTableDate = res.data;
      }
    },
    // 监听添加对话框的关闭事件
    addDialogClosed() {
      // 清空列表
      this.$refs.addFormRef.resetFields();
    },
    // 监听确定按钮
    addParmas() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return;
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName,
          }
        );

        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败');
        }
        this.$message.success('添加参数成功');
        this.addDialogVisible = false;
        this.getParamsData();
      });
    },
    // 监听编辑,修改，按钮
    async showEditDialog(attr_id) {
      // 查询当前参数的信息
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes/${attr_id}`,
        {
          params: {
            attr_sel: this.activeName,
          },
        }
      );

      if (res.meta.status !== 200) {
        return this.$message.error('获取参数信息失败');
      }

      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    // 重置修改的表单
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    // 监听修改表单，确定的按钮
    editParmas() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return;
        const { data: res } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          {
            attr_name: this.editForm.attr_name,
            attr_sel: this.activeName,
          }
        );
        if (res.meta.status !== 200) {
          this.$message.error('修改参数失败');
        } else {
          this.$message.success('修改参数成功');
          this.editDialogVisible = false;
          this.getParamsData();
        }
      });
    },
    // 根据id删除对应的参数项
    async removeParmas(attr_id) {
      const confirmResult = await this.$confirm('是否删除?', '提示', {
        success: '确定',
        cancel: '取消',
        type: 'warning',
      }).catch(err => err);
      // 取消操作
      if (confirmResult != 'confirm') {
        this.$message.info('已取消');
      } else {
        const { data: res } = await this.$http.delete(
          `categories/${this.cateId}/attributes/${attr_id}`
        );
        if (res.meta.status !== 200) {
          this.$message.error('删除参数失败');
        } else {
          this.$message.success('删除参数成功');
          this.getParamsData();
        }
      }
    },
    // Tag区域文本框失去焦点或者按下了回车触发的函数
    async handleInputConfirm(row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = '';
        row.inputVisible = false;
        return;
      }
      // 如果没有return 则证明输入的内容需要做后续处理
      row.attr_vals.push(row.inputValue.trim());
      row.inputValue = '';
      row.inputVisible = false;
      // 发起请求保存这一次操作
      this.saveAttrVals(row);
    },
    // 将对 attr_vals 的操作保存到数据库
    async saveAttrVals(row) {
      // 发起请求保存这一次操作
      const { data: res } = await this.$http.put(
        `categories/${this.cateId}/attributes/${row.attr_id}`,
        {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(' '),
        }
      );

      if (res.meta.status !== 200) {
        this.$message.error('修改参数项失败');
      }

      this.$message.success('修改参数项成功！');
    },
    // 点击按钮展示文本输入框
    showInput(row) {
      row.inputVisible = true;
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus();
      });
    },
    // 删除tag标签触发的函数
    handleCloes(index, row) {
      row.attr_vals.splice(index, 1);
      this.saveAttrVals(row);
    },
  },
  computed: {
    isBtnDisabled() {
      if (this.selectCateKey.length !== 3) {
        return true;
      } else {
        return false;
      }
    },
    // 当前选中的三级分类id
    cateId() {
      if (this.selectCateKey.length === 3) {
        return this.selectCateKey[2];
      } else {
        return null;
      }
    },
    // 动态计算dialog标题的文本
    titleText() {
      if (this.activeName === 'many') {
        return '动态参数';
      } else {
        return '静态属性';
      }
    },
  },
};
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.input-new-tag {
  width: 100px;
}
</style>